Optical pickup lens comprising a lens and a lens holder which have marks to easily mount the lens on the lens holder at a predetermined angle in the direction of rotation of the lens, and optical pickup unit comprising the optical pickup lens
US7099090B2 · kind B2 · utility
6Cited by
7References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2004 |
| Grant date | Aug 29, 2006 |
| Priority date | — |
| Expiry date | Feb 23, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical pickup lens having a lens and a lens holder, each of which has at least one mark in a direction of rotation based on an optical axis of the lens as a center of rotation. The mark(s) of the lens holder is provided so as to oppose the mark(s) of the lens. Preferably, the marks of the lens and the marks of the lens holder are provided at regular intervals. Since both the lens and the lens holder have the marks thereon, the lens can be mounted on the lens holder at a predetermined angle in the direction of rotation of the lens based on the center of rotation of the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.